US3603963A
Expired / Lapsed
US
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Seismic format generator
Assignee: Texas Instruments Inc
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Filing: 1967-12-29
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Granted: 1971-09-07
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Expires: 1987-12-29
Abstract
Abstract A seismic format generator for transforming an analog seismic signal into either a wiggle trace format, a variable area format, variable area plus wiggle trace, or variable density format. A shading function generator supplies a unipolar and bipolar shading function to a format selector for the variable area and variable density formats. Input instructions to the format selector determine the selective combination of various input signals to produce a desired seismic format. The seismic format is displayed on a cathode-ray tube which also receives a display blanking signal and an intensity modulating signal from the format selector.
Inventors
- 👤 Phillip W Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:57
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A seismic format generator for selectively producing, in response to a complete set of input instructions, an analog seismic signal in a plurality of formats for recordation and/or for display which comprises: means for generating a baseline control voltage for limiting said seismic signal above a preselected level, a tracewidth control voltage, unipolar and bipolar control voltages for selectively shading said seismic signal, a plurality of analog switches for combining said seismic signals with said control voltages, one for each of the desired combinations of the seismic signals and said control voltages, means for energizing each of said switches independently of each other by one of said input instructions, amplifying means connected to said switches for amplifying the selected combinations to produce a desired output format, and a diode limiting circuit coupled to said switches for selecting the voltage connected to said amplifying means through said switches in dEpendence on the respective magnitudes of said control voltages.
Claim 2
Dependent Claim
157 words
A seismic format generator for selectively producing, in response to a complete set of input instructions, an analog seismic signal in a plurality of formats for recordation and/or for display which comprises: means for generating a baseline control voltage for limiting said seismic signal above a preselected level, a tracewidth control voltage, unipolar and bipolar control voltages for selectively shading said seismic signal, a plurality of analog switches for combining said seismic signals with said control voltages, one for each of the desired combinations of the seismic signals and said control voltages, means for energizing each of said switches independently of each other by one of said input instructions, amplifying means connected to said switches for amplifying the selected combinations to produce a desired output format, and a diode limiting circuit coupled to said switches for selecting the voltage connected to said amplifying means through said switches in dEpendence on the respective magnitudes of said control voltages.
Claim 3
Dependent Claim
32 words
A seismic format generator as set forth in claim 1 including a second amplifying means for comparing the seismic signals with the baseline control voltage to generate a variable area blanking signal.
Claim 4
Dependent Claim
53 words
A seismic format generator as set forth in claim 1 wherein means in circuit with a first of said switches generates a wiggle trace format, with a second generates a variable area plus wiggle trace format, with a third generates a variable area format, and with a fourth generates a variable density format.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |